Hairy white oldfield aster (Symphyotrichum pilosum, Asteraceae) is very common in eastern North America and is generally considered a weed. Despite this, the red shoots and small yet showy flowers are somewhat attractive.
The name is quite a mouthful, but with nearly 26,000 species in the family Asteraceae, it can become necessary to get somewhat descriptive. The “hairy” part of the name comes from the white hairs on the shoots (visible near the top of the second photo). The “white” part is obvious. The “oldfield” part may suggest this plant’s tendency to grow up in fallow fields or other disturbed areas.
This plant used to be among about 600 other species in the genus Aster, but molecular studies in the last two decades have resulted in a split of this genus into several others. Despite this aster being moved to the genus Symphyotrichum, that genus still contains about 90 species. Many of them look very similar and it can be difficult to distinguish them.